Shadow Detection and its Removal in Images: A Review

Detecting objects under the influence of shadows is a difficult in computer vision. Shadows acts as barrier in correcting feature extraction of image features like buildings, towers etc. In urban regions, shadows cause artificial color nature and shape deformation of objects, which degrades the quality of images. In apparent path detection application, strong shadows on the road troubles the detection of the boundary between clear path and obstacles, making clear path detection algorithms less robust. Shadows affect many object detection algorithms. This paper is aimed to provide a survey on methodology and various algorithms and methods of shadow detection and removal.